The following reduction is best accomplished with:
(a) Zn/Hg, conc. HCl
(b) N2H4, C2H5ONa
(c) H2, Pd
(d) All of the above
My thoughts: By looking at the question it is evident that only the C=O group should be affected. H2/Pd is used for hydrogenation which might affect the C=C double bond as well. Option (a) gives the reagents which are used for the Clemmensen reduction which is used to convert carbonyl groups to alkanes. So, I think (a) is the correct answer. Is that right?